21238818

素因数分解:

$2^1\times 3^1\times {\mathrm{43}}^1\times {\mathrm{191}}^1\times {\mathrm{431}}^1$

素因数の和:670

約数の個数: 32

約数和(自身を含む): 43794432

約数和(自身を除く): 22555614

約数列:

[1, 2, 3, 6, 43, 86, 129, 191, 258, 382, 431, 573, 862, 1146, 1293, 2586, 8213, 16426, 18533, 24639, 37066, 49278, 55599, 82321, 111198, 164642, 246963, 493926, 3539803, 7079606, 10619409, 21238818]

約数ペア:

[(1, 21238818), (2, 10619409), (3, 7079606), (6, 3539803), (43, 493926), (86, 246963), (129, 164642), (191, 111198), (258, 82321), (382, 55599), (431, 49278), (573, 37066), (862, 24639), (1146, 18533), (1293, 16426), (2586, 8213)]